<template>
  <div>
    <div class="subject" v-for="(item,index ) in  allNum "   :key="index">
    <span>{{item.num1}}</span>
    <span>+</span>
    <span>{{ item.num2 }}</span>
    <span>=</span>
    <input type="number" v-model.number="value[index]"/>
    <button @click="submit(index)">提交</button>
  </div>
  </div>
</template>

<script>
export default {
    props:{
      allNum:Array
    },
   data(){
     return {
      value:[]
     }
   },
   methods:{
    submit(index){
      

   this.$emit('submit', this.value,index)

    }
   }
};
</script>

<style scoped>
.subject {
  margin: 5px;
  padding: 5px;
  font-size: 20px;
}
.subject span {
  display: inline-block;
  text-align: center;
  width: 20px;
}
.subject input {
  width: 50px;
  height: 20px;
}
</style>